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THE REMOVING METHOD OF THE HARD-TO-REMOVE CHEMICAL OOXYGEN DEMAND COMPONENTS FROM FLEW GAS DESULFURIZATION WASTE WATER BY PALLADIUM-BASED BIMETAL
THE REMOVING METHOD OF THE HARD-TO-REMOVE CHEMICAL OOXYGEN DEMAND COMPONENTS FROM FLEW GAS DESULFURIZATION WASTE WATER BY PALLADIUM-BASED BIMETAL
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机译：钯基双金属去除烟气脱硫废水中难除化学需氧量的方法
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摘要
The present invention relates to a toxic substance, in particular I method of removing COD treatability (Cemical Oxygen Demand) components from the flue gas desulfurization waste water originating from a plant such as thermal power stations,; Conventional removal method of nitrite (NO 2-) in the desulfurization waste water in an atmosphere, i using a method for decomposing I treatability COD components by reacting treatability COD component and a nitrite as intermediates of N 2 O and sulfuric acid or a sulfate in order to process the ion NaHSO - coming However, nitrite ions (NO 2-) nitrite done due to the use of NaNO 2 for the supply remaining in the desulfurization waste water (NO 2-) using NaOCl for processing and re resulting OCl It shall in a third, and to meet the critical reaction conditions of pH HCl, inevitable excess input, such as NaOH, and so need to keep the reaction temperature at 45 ~ 55 ℃ high operating costs due to the temperature rise and used chemicals but it did not have serious problems, such as environment-friendly with no choice but to become a secondary pollutant produced by chemical inputs,; Removal process according to the invention the quality adsorb nitrate ions to linger in large quantities in the Fig desulfurization waste water without value at all using chemicals to after contact with the bimetallic catalyst of palladium system, the bimetal by an active hydrogen ions present in the waste water by reduction of an acid ion to nitrite, I sikimyeo decomposed treatability by COD components and reaction intermediates of N 2 O with a sulfate ion or a sulfate, N 2 O is present in the following, the desulfurization waste water re-absorption in the bimetallic catalyst of palladium system as soon by the active hydrogen ions are reduced to molecular nitrogen released into the atmosphere as well, the decomposition of sulfuric acid or sulfate ion is comprised by precipitation with high salt yisuseok by limestone injection of a very small amount,; Removal process according to the invention additional installation costs and possible to remove the I treatability COD components without the use of additional chemicals added to easily and efficiently, the bimetallic palladium strains used can be semi-permanently in accordance with carrying out the catalyst this does not enter, the reaction can be removed, and can be significantly reduced as the operating costs for reasons such as the entire process very simple and at the same time, the advantages that can make the most of the adsorption capacity of the organic COD components of the filter at room temperature.
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